mc146818rtc.h
上传用户:lgb322
上传日期:2013-02-24
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文件大小:1k
- /*
- * Machine dependent access functions for RTC registers.
- */
- #ifndef _ASM_MC146818RTC_H
- #define _ASM_MC146818RTC_H
- #include <linux/config.h>
- #include <asm/atarihw.h>
- #ifdef CONFIG_ATARI
- /* RTC in Atari machines */
- #include <asm/atarihw.h>
- #include <asm/atariints.h>
- #include <asm/io.h>
- #define RTC_HAS_IRQ (ATARIHW_PRESENT(TT_MFP))
- #define RTC_IRQ IRQ_TT_MFP_RTC
- #define RTC_IRQ_FLAGS IRQ_TYPE_FAST
- #define RTC_PORT(x) (TT_RTC_BAS + 2*(x))
- #define RTC_ALWAYS_BCD 0 /* TOS uses binary mode, Linux should be able
- * to deal with both modes */
- #define RTC_CHECK_DRIVER_INIT() (MACH_IS_ATARI && ATARIHW_PRESENT(TT_CLK))
- #define RTC_MACH_INIT()
- do {
- epoch = atari_rtc_year_offset + 1900;
- if (RTC_HAS_IRQ)
- /* select RTC int on H->L edge */
- tt_mfp.active_edge &= ~0x40;
- } while(0)
- #define RTC_MACH_EXIT()
- /* On Atari, the year was stored with base 1970 in old TOS versions (before
- * 3.06). Later, Atari recognized that this broke leap year recognition, and
- * changed the base to 1968. Medusa and Hades always use the new version. */
- #define RTC_CENTURY_SWITCH -1 /* no century switch */
- #define RTC_MINYEAR epoch
- #define CMOS_READ(addr) ({
- atari_outb_p((addr),RTC_PORT(0));
- atari_inb_p(RTC_PORT(1));
- })
- #define CMOS_WRITE(val, addr) ({
- atari_outb_p((addr),RTC_PORT(0));
- atari_outb_p((val),RTC_PORT(1));
- })
- #endif /* CONFIG_ATARI */
- #endif /* _ASM_MC146818RTC_H */